Lamp fixture



INVEN'ILOR. JUL/AN AMC DER/warf July 20, 1965 J. A. MCDERMOTT LAMPFIXTURE Filed Dec. 4, 1962 United States ngoo@ LAM? FlX'llllE Julian A.lrlclermott, i639 Stephen St., New Yorin N55. Filed Bec. e, 1.962, Ser.No. 242,142 5 Claims. (Cl. 24d- ESD This invention relates broadly tolighting natures, and more specically to directional type lightingfixtures. Directional lamps are frequently used as warning lamps. Adirectional lamp must be so constructed, that easy access to itsinterior can be had, when it is necessary to replace burned-out bulbs.

Barrel type or cylindrical type factures are frequently preferred aswarning larnps, since they are simple and rugged in construction. Dilculty arises when a bulb must be replaced. The lens must be pried out ofthe cylinder, resulting in loss of time and possible damage to the lens.If the bulb is maintained on the outside edge of the cylinder, it issubject to damage and tampering. lf the lens is maintained in the framein a sufficiently loose position so that the lens can be caused to fallout by itself, urging means will not be required, but in suchconstruction, the entire tixture must be tipped to effect the release ofthe lens, which is not practical when the lixture is mounted on astanchion or other support.

With this in View, it is the principal object of the present inventionto provide a lighting fixture of this character, wherein a lens ismaintained in the cylinder by tamper-resistant means.

Another advantage of the present invention resides in the provision ofan axially rotatable arm, the rotative movement of which will tip a partof the lens out of the cylinder into a position wheer it can be manuallywithdrawn from the cylinder.

A still further aim of the present invention resides in the provision ofa lighting xture of this character having ta1nper-resistant retainingmeans for the lens which are adapted to be removed from the path of thelens when itis desired to remove or re-insert the lens` A still furtherpurpose of the present invention resides in the provision of meanswhereby the lens removal and replacement can be accomplished with aminimum loss of tinte and without special tools.

These and other meritorious aims and advantages which will become morefully apparent as the description here of proceeds, are attained by thenovel construction, coinbination and arrangement of parts, hereinafterdescribed, and illustrated in the accompanying drawing, constituting amaterial component of the present disclosure, and in which:

FGURE l is a top plan view of the principal embodiment of the presentinvention.

FlGURB 2 is a partial plan view of the embodiment illustrated in FIGUREl, one lens being illustrated in the process of ejection from thecylinder.

FIGURE 3 is a front elevational view of the lighting xture illustratedin FIGURE l, part of one lens being broken away to show the interiorconstruction.

FIGURE 4 is a side elevational View partly in section of the lightingfixture illustrated in FIGURE 3.

FIGURE 5 is a bottoni view of the lighting fixture illustrated in FGURE3.

FGURE 6 is a fragmentary view of the upper segment of a lighting fixtureshowing a modied form of a lens electing arm.

FIGURE 7 is a View similar to FGURE 6 showing another rnodied ejectingarm.

FGURE 8 shows the modiied arm illustrated in FIG- URE 7 in the processof ejecting a lens,

Referring in greater detail to the drawing, and more particularly toFIGURES l through 5 thereof, the nulbg Patented July 20, i965 rneral l@illustrates in general a cylinder type lighting xture provided with alens electing arrn construction in accordance with the principalembodiment of the present invention. Lighting fixture lo comprisesbroadly a stand lll which may be constructed in any suitable anddesirable manner. Mounted upon and secured to the stand ll. is aring-lille frame member l2 in which are spacedly retained a pair oflenses i3. The use of two lenses is optional, since some lightingiixtures of this character have only one lens. Secured to stand ll andpositioned between lenses E3 in any suitable and desirable manner is abulb and a bulb retaining mount ld ot conventional construction.

At spaced intervals, traine l2 is provided with a plural ity of stoppins l5 and 15a, three such pins being illustrated in the drawing, thepurpose of which it is to retain the lens or lenses rinly in the saidframe member, the specific purpose ot pin 15a being to prevent the lensfrom becoming inadvertently disengaged at the bottoni of the framemember. A removable bolt i6 is provided to retain each lens in positionin the frame i2.

All of the elements hereabove described are conventional and do notconstitute a part of the present invention.

The present invention comprises a lens election arm l?, secured bywelding or otherwise to a bolt lila terminating at one end in a screwhead iS, the said bolt l8r; extending into frame 12 between lenses i3 asis illustrated in FGURE 3 of the drawing.

Between the screw head lll and the frame l2, an eccentric washer i9 issecured to bolt 18a for a purpose which will presently become more fullyapparen Adjacent eccentric washer l, the said iframe member l2 isprovided with a stop rivet wat, the purpose of which will also presentlybecome more fully apparent. A rubber gasket l may be circumferentiallyprovided for each of the said lenses l?) to prevent water from enteringthe interior of the lighting i'ixture.

Reference numeral 2li designates a conventional base for conventionallamp mount 14 through which electric wires 22a pass through stand ll ina conventional manner.

The modilication illustrated in FlGUllE 6 comprises an ejection armith/'a terminating at one end in a hook and its other end in a screwhead 18a, the said hooked end positioned in freine i261 between lenses13. Retainer screws lon are provided, one for each of the said lenses13a. Water-proof gasketing la may be provided for each or the saidlenses. rl`he head of a conventional screw driver l'b is shown inengagement in screw head 18a.

The modification illustrated in FIGURES 7 and 8 cornprises asubstantially V-shaped ejecting arrn, one leg 171) of which ispositioned in trarne member l2?) in contact with lens lh. The other leglib of which extends outwardly through an opening in the said frame 12band in its inoperative position the underside lc or" the said leg lbrests upon frame member 12b. Leg lb, near the upper end thereof, isJrovided with a stop member 13d for a purpose which will become apparentpresently. Adjacent the ejection arm i7, the outer face or" frameniernber l2 may have a two-directional arrow 27 provided thereon bypainting or otherwise.

The device is used inthe following manner:

When it is desired to remove a lens in order to replace a bulb or forany other reason, screw le, which retain-s the lens in the frame member,is withdrawn as illustrated at 16a in FlGURE 6. By using a conventionalscrew driver in an obvious manner, the arm 17 is urged against lens 13as illustrated in FIGURE 2, until the lens is sufficiently ejected topermit the user to enter a linger behind the lens and withdraw thepartly ejected lens Yfrom being entered too far into the frame.

' ways of ejecting a lens from the frame.

manually. ARotation of arm 7 is limited by the provision of theeccentricwasher 19 which will be stopped on contact by pin 19a. This hasthe advantage, when double lenses are used, that the ejection armvisalways on the side indicated by arrow 27, so that the user will know thedirection in which to turn the screw head 1S. When the` lens isVejected, pin a will prevent the lens from dropping out of the frame. Itmu-st be manually withdrawn, thus reducing the danger of breakage. Whendesired, the removed lens is returned to its position in the frame in anobvious manner. Toward that end, the purpose of pins 15 is to positionthe lens and prevent it Screw 16 is returned into position and thelighting fixture is again ready for use.

Ejection arm 17a differs from ejection arm 17 in that the former `ishooked and therefore need not be provided with an eccentric washer, sothat lit can rotate axially Without stop.

The modication illustrated in FIGURES 7 and 8 differs from'the otherforms in that the ejection arm 17E: rotates in a vertical plane insteadof a horizontal plane. Thus, by lifting the leg Mib, ejection of lens13b is accomplished, as is Aillustrated in FIGURE S of the drawing.

Thus there has been shown and described a lighting fixture having acylindrical frame, and the Vbest known i It is to be understood that thepresent disclosure is to be regarded as illustrative and descriptive ofthe best known forms .of the present invention and not as limitative orrestrictive to the exact details shown, applicant reserving the right tomake such changes in the construction of his invention as might comewithin the scope of the appended claims without thereby departing eitherfrom the spirit or the scope of the present invention.

Having thus described the invention, what is claimed as neWvand desiredto secure by Letters Patent, is:

1. The combinationwith a cylindrically shaped lighting fixture includinga frame having a pair of spaced-apart lenses removably retained therein;of a device for selecstively tipping a segment of a `lens edge out ofthe frame 4to -a -position where the tipped lens can be manuallywithdrawn from the frame, said lens tipping device comprising a bodymember, `said body member rotatably mounted in the frame, one end ofsaid body member 4extending through and into the yframe to a .position.be-

tween the lenses, means -on said end tipping the lens upon contact, andsaid lens ltipping means operable from .out- -side the frame.

2. The combination with a barrel type lighting xture including a framehaving a lens removably retained therein; of means for tipping a segmentof the lens edge out of the frame into a position where it can be4manually withdrawn from the frame, said lens tipping means comprising astem, said stem axially rotatably ymounted Vin the frame, one end ofsaid stem entered into and through the frame to a position adjacent thelens, lens tipping means on said stem end to tip a segment of the lensout of the frame upon impact of said lens tipping means with the lensedge, and said impact producing means activated from outside th-e frame.

3. The combination with a cylindrically shaped warning lamp including aframe member edgewise retaining a pair of spaced-apart lenses therein;of a device for :tipping selectively a segment oi a lens edge out of theframe into a position where the tipped lens can be manuallyWithdrawnrfrom the frame, said tipping device comprising a stem, saidstem axially rotatable in the frame, one end of said stem entered intoand through the frame to a position between the lenses, a hook formed atsaid stem end -in alignment with a lens edge, forceful contact of saidhook with the .lens tipping the lens Vedge out of the frame, and saidcontact producing means operable from outside the frame.

4. The combination with a cylindrical warning lamp including a framehaving a pair of spaced-apart lenses retained therein edgewise; of adevice to tip a segment of either lens out or" the frame to a positionWhere the tipped lens can be manual-1y Withdrawn from the frame, saidlens tipping device comprising a stem axially rotatable in the frame,one end of said stem extending into and Vthrough the frame to a positionbetween the lenses, a hook formed integrally with said lstem end,forceable Contact of said hook with either ot the lenses tipping thelens segment out of the frame, the other end of said stem terminating ina screw head, and said screw head Vadapted to be turned to activate thehook of said stem.

5. The combination with a warning lamp of the character described; ofmeans to tip a segment of the lens edge out of the frame, said tippingmeans comprising an axially rotatable stem in the frame7 one end of saidstem entered into and through the frame into a Vposition between thelenses, a hook formed integrally with said stem end, forceable contactof said hook with a segment of -a lens tipping the lens segment out ofthe frame, the other end kof said stern terminating' in a screw head,rotation of said screw head outside the frame causing contact betweensaid hook and the lens segment, an eccentric interposed between saidscrew head and the frame, and a stop on the frame inthe path oftheeccentric limiting the rotative movement of said stem.

References Cited by the Examiner UNITED STATES PATENTS 314,657 3/85Dressel 24O-4l55Y 930,306 8/09 Miner 220-43 X 1,070,383 8/13 Lutwyche240/41 1,982,124 ll/34l Smith. 2,981,828 4/61 Norden 240-8.l8

'.NoRfroN ANSHER, Primary Examiner,

1. THE COMBINATION WITH A CYLINDRICALLY SHAPED LIGHTING FIXTUREINCLUDING A FRAME HAVING A PAIR OF SPACED-APART LENSES REMOVABLYRETAINED THEREIN; OF A DEVICE FOR SELECSTIVELY TIPPING A SEGMENT OF ALENS EDGE OUT OF THE FRAME TO A POSITION WHERE THE TIPPED LENS CAN BEMANUALLY WITHDRAWN FROM THE FRAME, SAID LENS TIPPING DEVICE COMPRISING ABODY MEMBER, SAID BODY MEMBER ROTATABLY MOUNTED IN THE FRAME, ONE END OFSAID BODY MEMBER EXTENDING THROUGH AND INTO THE FRAME TO A POSITIONBETWEEN THE LENSES, MEANS ON SAID END TIPPING THE LENS UPON CONTACT, ANDSAID LENS TIPPING MEANS OPERABLE FROM OUTSIDE THE FRAME.